diff --git a/ivatar/test_opentelemetry.py b/ivatar/test_opentelemetry.py
index 2b14032..86b3550 100644
--- a/ivatar/test_opentelemetry.py
+++ b/ivatar/test_opentelemetry.py
@@ -50,7 +50,10 @@ class OpenTelemetryConfigTest(TestCase):
             config = OpenTelemetryConfig()
             # In CI environment, OpenTelemetry might be enabled by CI config
             # So we test that the config respects the environment variables
-            if "OTEL_ENABLED" in original_env and original_env["OTEL_ENABLED"] == "true":
+            if (
+                "OTEL_ENABLED" in original_env
+                and original_env["OTEL_ENABLED"] == "true"
+            ):
                 self.assertTrue(config.enabled)
             else:
                 self.assertFalse(config.enabled)
@@ -327,7 +330,6 @@ class AvatarMetricsTest(TestCase):
         )
 
 
-@pytest.mark.opentelemetry
 class TracingDecoratorsTest(TestCase):
     """Test tracing decorators."""
 
@@ -402,7 +404,6 @@ class TracingDecoratorsTest(TestCase):
         self.assertEqual(result, "success")
 
 
-@pytest.mark.opentelemetry
 class IntegrationTest(TestCase):
     """Integration tests for OpenTelemetry."""
 
@@ -434,7 +435,10 @@ class IntegrationTest(TestCase):
         try:
             # In CI environment, OpenTelemetry might be enabled by CI config
             # So we test that the function respects the environment variables
-            if "OTEL_ENABLED" in original_env and original_env["OTEL_ENABLED"] == "true":
+            if (
+                "OTEL_ENABLED" in original_env
+                and original_env["OTEL_ENABLED"] == "true"
+            ):
                 self.assertTrue(is_enabled())
             else:
                 self.assertFalse(is_enabled())
@@ -448,7 +452,6 @@ class IntegrationTest(TestCase):
         self.assertTrue(config.enabled)
 
 
-@pytest.mark.no_opentelemetry
 class OpenTelemetryDisabledTest(TestCase):
     """Test OpenTelemetry behavior when disabled (no-op mode)."""
 
@@ -474,7 +477,10 @@ class OpenTelemetryDisabledTest(TestCase):
         try:
             # In CI environment, OpenTelemetry might be enabled by CI config
             # So we test that the function respects the environment variables
-            if "OTEL_ENABLED" in original_env and original_env["OTEL_ENABLED"] == "true":
+            if (
+                "OTEL_ENABLED" in original_env
+                and original_env["OTEL_ENABLED"] == "true"
+            ):
                 self.assertTrue(is_enabled())
             else:
                 self.assertFalse(is_enabled())